forked from luck/tmp_suning_uos_patched
51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
// Copyright (C) 2005-2017 Andes Technology Corporation
|
||
|
|
|
||
|
|
#include <linux/spinlock_types.h>
|
||
|
|
#include <linux/mm.h>
|
||
|
|
#include <linux/sched.h>
|
||
|
|
#include <asm/nds32.h>
|
||
|
|
#include <nds32_intrinsic.h>
|
||
|
|
|
||
|
|
unsigned int cpu_last_cid = { TLB_MISC_mskCID + (2 << TLB_MISC_offCID) };
|
||
|
|
|
||
|
|
DEFINE_SPINLOCK(cid_lock);
|
||
|
|
|
||
|
|
void local_flush_tlb_range(struct vm_area_struct *vma,
|
||
|
|
unsigned long start, unsigned long end)
|
||
|
|
{
|
||
|
|
unsigned long flags, ocid, ncid;
|
||
|
|
|
||
|
|
if ((end - start) > 0x400000) {
|
||
|
|
__nds32__tlbop_flua();
|
||
|
|
__nds32__isb();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
spin_lock_irqsave(&cid_lock, flags);
|
||
|
|
ocid = __nds32__mfsr(NDS32_SR_TLB_MISC);
|
||
|
|
ncid = (ocid & ~TLB_MISC_mskCID) | vma->vm_mm->context.id;
|
||
|
|
__nds32__mtsr_dsb(ncid, NDS32_SR_TLB_MISC);
|
||
|
|
while (start < end) {
|
||
|
|
__nds32__tlbop_inv(start);
|
||
|
|
__nds32__isb();
|
||
|
|
start += PAGE_SIZE;
|
||
|
|
}
|
||
|
|
__nds32__mtsr_dsb(ocid, NDS32_SR_TLB_MISC);
|
||
|
|
spin_unlock_irqrestore(&cid_lock, flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
|
||
|
|
{
|
||
|
|
unsigned long flags, ocid, ncid;
|
||
|
|
|
||
|
|
spin_lock_irqsave(&cid_lock, flags);
|
||
|
|
ocid = __nds32__mfsr(NDS32_SR_TLB_MISC);
|
||
|
|
ncid = (ocid & ~TLB_MISC_mskCID) | vma->vm_mm->context.id;
|
||
|
|
__nds32__mtsr_dsb(ncid, NDS32_SR_TLB_MISC);
|
||
|
|
__nds32__tlbop_inv(addr);
|
||
|
|
__nds32__isb();
|
||
|
|
__nds32__mtsr_dsb(ocid, NDS32_SR_TLB_MISC);
|
||
|
|
spin_unlock_irqrestore(&cid_lock, flags);
|
||
|
|
}
|